EVAP System, Checking For Leaks
Special tools and workshop equipment required
- Smoke tester.
- EVAP and Fuel Supply System Vacuum hose and line routing diagram.
Replace seals and gaskets when performing repair work.
Leak checking
-- Using a Smoke tester, check the Evaporative Emission (EVAP) canister system for leaks.
Always follow the manufacturers directions for the proper installation and operation of the Smoke tester being used.
If a leak is detected:
-- Check the fuel filler cap seal for damage and for proper installation. Replace if necessary.
-- Check the seals under the locking flanges and the union nuts are properly tightened on the fuel tank.
-- Check all hose connections of the fuel supply system and replace or repair any leaking lines.
-- Check all hose connections of the EVAP system and replace or repair any leaking lines.
-- Repair or replace any damaged component.
If no leaks are found in the EVAP and Fuel Supply System:
-- Erase the DTC memory if a DTC was set. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
-- Perform a road test to verify repair.
If a DTC was set and does not return:
Repair complete, Generate readiness code. Refer to READINESS CODE DESCRIPTION .
-- End diagnosis.
If the DTC does return and no leaks are found in the EVAP and Fuel Supply System:
-- Check the DTC memory for any DTC codes pertaining to the EVAP and Fuel Supply Systems. If a DTC is stored, perform the diagnostic test procedure for the suspected component. Refer to DIAGNOSTIC MODE 03 - READ DTC MEMORY .
End diagnosis.